Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 275/70-18 | 285/70-17 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 33.16 (842.2) | 32.71 (830.8) | -0.45 (-11.4) -1.4% |
| Width inches (mm) | 10.83 (275) | 11.22 (285) | 0.39 (10) 3.6% |
| Circum. inches (mm) | 104.17 (2645.85) | 102.76 (2610.04) | -1.41 (-35.81) -1.4% |
| Sidewall Height inches (mm) | 7.58 (192.5) | 7.85 (199.5) | 0.28 (7) 3.6% |
| Revolutions per mile (km) | 608.25 (377.95) | 616.6 (383.14) | 8.35 (5.19) 1.4% |
285/70-17 Tires
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 19.73 mph (31.75 km/h) |
| 25 mph (40.23 km/h) | 24.66 mph (39.69 km/h) |
| 30 mph (48.28 km/h) | 29.59 mph (47.63 km/h) |
| 35 mph (56.33 km/h) | 34.53 mph (55.56 km/h) |
| 40 mph (64.37 km/h) | 39.46 mph (63.5 km/h) |
| 45 mph (72.42 km/h) | 44.39 mph (71.44 km/h) |
| 50 mph (80.47 km/h) | 49.32 mph (79.38 km/h) |
| 55 mph (88.51 km/h) | 54.26 mph (87.32 km/h) |
| 60 mph (96.56 km/h) | 59.19 mph (95.25 km/h) |
| 65 mph (104.61 km/h) | 64.12 mph (103.19 km/h) |
| 70 mph (112.65 km/h) | 69.05 mph (111.13 km/h) |
| 75 mph (120.7 km/h) | 73.98 mph (119.07 km/h) |
| 80 mph (128.75 km/h) | 78.92 mph (127.01 km/h) |
| 85 mph (136.79 km/h) | 83.85 mph (134.94 km/h) |
| 90 mph (144.84 km/h) | 88.78 mph (142.88 km/h) |
| 95 mph (152.89 km/h) | 93.71 mph (150.82 km/h) |
| 100 mph (160.93 km/h) | 98.65 mph (158.76 km/h) |
| 2.35 | 2.73 | 2.94 | 3.07 | 3.21 | 3.31 | 3.42 | 3.55 | 3.73 | 3.91 | 4.11 | 4.27 | 4.56 | 4.88 | 5.13 | 5.29 | 5.38 | 5.71 | 6.17 | 7.17 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1569 | 1823 | 1963 | 2050 | 2143 | 2210 | 2284 | 2370 | 2491 | 2611 | 2744 | 2851 | 3045 | 3258 | 3425 | 3532 | 3592 | 3813 | 4120 | 4788 |
Better Fuel Economy Factory Ratios Increased Power
